Question

Annual rings are the bands of

• A. Secondary cortex and cork
• B. All secondary vascular tissue
• C. Secondary xylem and xylem rays
• D. Secondary phloem and medullary rays

Answer 1

Answer: (C)

Secondary xylem and xylem rays

The unequal activity of vascular cambium leads to the formation of annual rings. The activity of cambium varies greatly all through the season. Activity of vascular cambium is affected by physiological and environmental factors. In winter or autumn season the activity of the cambium is less and the secondary xylem or wood and xylem rays formed is not extensive through the vascular cambium.

So, the correct answer is option C.